Bundle-ether ASR9K to WS3750X

[Rudolfs Balodis]

Hello!

I'm having trouble setting up port-channel between cisco ASR9K and stack of WS-C3750X-48T-S.

It seems to be configured correctly, but interfaces are down. Any ideas?

Here is my config:

ASR9K:

Cisco IOS XR Software, Version 4.2.1[Default]

!

interface Bundle-Ether4

description IN4 LAG

bundle minimum-active links 1

!

interface Bundle-Ether4.250

vrf AAAA

ipv4 address A.B.C.D 255.255.255.224

encapsulation dot1q 250

!

interface Bundle-Ether4.251

vrf AAAA

ipv4 address A.B.C.D 255.255.255.224

encapsulation dot1q 251

!

interface Bundle-Ether4.256

vrf BBBB

ipv4 address A.B.C.D 255.255.255.248

encapsulation dot1q 256

!

interface Bundle-Ether4.260

vrf AAAA

ipv4 address A.B.C.D 255.255.255.192

encapsulation dot1q 260

!

interface Bundle-Ether4.261

vrf AAAA

ipv4 address A.B.C.D 255.255.255.224

encapsulation dot1q 261

!

interface Bundle-Ether4.262

vrf AAAA

ipv4 address A.B.C.D 255.255.255.224

encapsulation dot1q 262

!

Physical interfaces:

!

interface GigabitEthernet0/2/0/12

bundle id 4 mode active

negotiation auto

!

interface GigabitEthernet0/4/0/12

bundle id 4 mode active

negotiation auto

!

======

Cisco WS-C3750X-48T-S stack:

IOS  WS-C3750X-48       12.2(55)SE3           C3750E-UNIVERSALK9-M

interface GigabitEthernet1/1/4

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 250,251,256,260-262

switchport mode trunk

switchport nonegotiate

channel-group 6 mode on

!

interface GigabitEthernet2/1/4

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 250,251,256,260-262

switchport mode trunk

switchport nonegotiate

channel-group 6 mode on

!

interface Port-channel6

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 250,251,256,260-262

switchport mode trunk

switchport nonegotiate

Thanks in advance

[Alexei Kiritchenko · Accepted solution]

Hello Rudolfs,

In your troubleshooting try to simplify the setup and troubleshoot smaller and simper parts.

Are the physical interfaces UP/UP without the bundle?

Do you have connectivity between the devised over the physical ports?

Does the bundle work with one member or with another?

….

Regards,

/A

[Rudolfs Balodis]

Hello,

I have tried to configure only one interface on bundle, no succsess. So I cleared config on both sides, and configured a simple trunk on boths sides, but it still didn't came up. So now I will go to site, and do L1/L2 troubleshooting.

[YUEN WAI NAM]

Seem ASR port-channel use LACP while 3750 not.

[Rudolfs Balodis]

Hello,

I got it working! Problem was faulty SFP on 3750 switches. Changed SFP's and config to:

ASR9K:

Gi0/2/0/12

bundle id 4 mode active

Gi0/4/0/12

bundle id 4 mode active

3750X

Gi1/1/4

channel-group 6 mode active

Gi2/1/4

channel-group 6 mode active

Thanks for your help,

Rudolfs